<template>
    <div class="upload-container">
        <el-upload
            :action="action"
            :headers="headers"
            :multiple = 'false'
            :limit = '1'
            :before-upload = "beforeUpload"
            :on-success="onSuccess"
            :on-error="onError"
            :on-remove="onRemove"
            :file-list="fileList"
            :on-exceed="onExceed"
            :disabled="disabled"
            drag
            show-file-list
            accept="application/epub+zip"
            class="image-upload"
        >
            <i class="el-icon-upload"></i>
            <div class="el-upload_text" v-if="fileList.length === 0">将电子书拖入或<em>点击上传</em></div>
            <div class="el-upload_text" v-else>图书已上传</div>
        </el-upload>
    </div>
</template>

<script>
    import { getToken } from "../../utils/auth"
    export default {
        name: "index",
        data(){
            return {
                action:`${process.env.VUE_APP_BASE_API}/book/upload`
            }
        },
        props:{
          fileList:{
              type:Array,
              default(){
                  return []
              }
          },
          disabled:{
              type:Boolean,
              default:false
          }
        },
        computed:{
            headers(){
                let mytoken = 'Bearer '+getToken()
                console.log(mytoken)
                return{
                    Authorization:mytoken
                }
            }
        },
        methods:{
            beforeUpload(file){
                console.log(file)
                this.$emit('beforeUpload', file)
            },
            onSuccess(response, file){
                // console.log(response, file)
                const {code, msg, data} = response
                if(code ==0 ){
                    this.$message({
                        message:msg,
                        type:'success'
                    })
                    this.$emit('onSuccess',data)
                }
            },
            onError(err){
                console.log({err})
                const errMsg = err.message && JSON.parse(err.message)
                this.$message({
                    message:(errMsg&&errMsg.msg&&`上传失败，失败原因:${errMsg.msg}` || '上传失败'),
                    type:'error'
                })
                this.$emit('onError',err)
            },
            onRemove(){
                this.$message({
                    message:'电子书删除成功',
                    type:'success'
                })
                this.$emit('onRemove')
            },
            onExceed(){
                this.$message({
                    message:'每次只能上传一本电子书',
                    type:'warning'
                })
            }
        }
    }
</script>

<style lang="stylus" scoped>

</style>